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8350ac8e11
The OMAP DSI command mode panel driver used to send page & column address before each frame update, and this code was moved into the DSI host driver when converting it to the DRM bridge model. However, it's not really required to send the page & column address before each frame. It's also something that doesn't really belong to the DSI host driver, so we should drop the code. That said, frame updates break if we don't send _something_ between the frames. A NOP command does the trick. It is not clear if this behavior is as expected from a DSI command mode frame transfer, or is it a feature/issue with OMAP DSI driver, or a feature/issue in the command mode panel used. Most likely this is related to the following from the DSI spec: "To enable PHY synchronization the host processor should periodically end HS transmission and drive the Data Lanes to the LP state. This transition should take place at least once per frame." Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-62-tomi.valkeinen@ti.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.